Stable Two-Dimensional Radioactive Films: An Atomic-Scale Picture

Atomistic view of the radioactive film (I in purple and Te in green).

Atomistic view of the radioactive film (I in purple and Te in green).

Two dimensional radioactive films are a new and exciting system to study nuclear decay at the atomic level with applications in a variety of fields ranging from medical imaging to cancer therapy. Before these films can be used in real-world application however, their behaviour and stability under ambient conditions has to be understood. This study, which was done in collaboration between the experimental group of Prof. Sykes (Tufts University, USA) and the computational group of Prof. Michaelides (University College London, UK) addresses precisely that issue. Using X-ray photoelectron spectroscopy and scanning tunneling microscope experiments combined with density functional theory computations the authors were able to monitor the decay product, 125Te, over time with atomistic resolution. This work reveals not only that the radioactive films and the decay product are stable in air at ambient conditions, but also shows precisely what happens to these films over time. Freshly formed Te is bound very strongly to the gold substrate, even stronger than the radioactive iodine atoms, and oxidises to TeO2 in air. TeO2 units are able to diffuse through the films and tend to dimerize to (TeO2)2. The radioactive films as well as the decay products remain intact throughout these reactions. This crucial insight opens the door for a range of useful applications of two dimensional radioactive films on gold. Adsorbed on gold nanoparticles they could for example lead to highly targeted cancer therapy treatments.

This study builds upon previous collaborative work in which the radioactive films have been introduced to the community (seeNature Materials 14, 904 (2015)) and is available at ACS Nano

News

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Angelos has been awarded the RSC Surfaces and Interfaces Award!

Angelos has been awarded the Royal Society of Chemistry Surfaces and Interfaces Award, for “outstanding contributions towards the understanding of complex aqueous interfaces and the formation of ice at such interfaces.” More information can be found here: https://www.rsc.org/awards-funding/awards/2020-winners/ Congratulations Angelos!

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New Humboldt-Fellow in the group

Julia was successful in her application for an Alexander von Humboldt Fellowship and will continue her work in the ICE group with the Feodor Lynen Fellowship of the Alexander von Humboldt Foundation as of 1st June 2020. Congratulations Julia!  

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The ICE group is moving!

Angelos has accepted a position in Cambridge, and so the ICE group is moving! It’s going to be a reasonably slow multi-year phase transition. You can find more information in the official announcement. Congratulations, Angelos, and all the best for this exciting new opportunity!

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Angelos appears on Clarivate’s ‘Highly Cited Researchers’ list!

Angelos has appeared on Clarivate’s ‘Highly Cited Researchers’ list for the second year in a row. Inclusion on the list is based on the number of recent publications that ranked in the top 1% by citations in a given field and year. For further details see: https://www.ucl.ac.uk/news/2019/nov/ucl-academics-named-global-list-influential-researchers Congratulations!

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Martin wins PhD prize!

Martin won the Marshall Stoneham prize for his PhD thesis on “Merging data-driven and computational methods to understand ice nucleation”. It is awarded by the Condensed Matter & Materials Physics Group (CMMP) for outstanding postgraduate research. Well done!

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Fabian wins Best Poster prize at the MMM Hub conference!

The second annual Materials & Molecular Modelling (MMM) Hub Conference and User Meeting took place on 3-4 September. Many excellent talks demonstrated how the computational resources provided by the MMM Hub are used to tackle challenges in many areas of biological, chemical, and physical research. This was also illustrated by more than 50 posters, spanning […]

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Science and sports in York

Last weekend, the ICE group gathered in York for the International Materials Simulation Workshop. Current and former members as well as collaborators talked about their recent projects and discussed how to tackle society’s big challenges, utilize advancements in methodology and make the most of fruitful collaborations. The meeting highlighted the diverse range of problems that […]

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Triple Triathlon at Castle Howard in support of WaterAid

The ICE group will be participating in the Castle Triathlon series for the third year in a row. This time, three relays teams are going to compete at Castle Howard, near York, on 21 July. They will be swimming, cycling and running a combined distance of roughly 280 km! As part of the tradition, the […]

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Open postdoc position (University of Manchester & ICE group)

A 2-year postdoc position is available in the Condensed Matter Physics group at the University of Manchester. The project will be carried out in collaboration with the ICE group and involves developing and applying theoretical models to understand the anomalous dielectric behaviour of water under confinement (Fumagalli et al. Science 360, 1339-1342, 2018). You can […]

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Angelos sets world record at the London Marathon!

Angelos set a new world record for the “fastest marathon dressed as a scientist (male)” at this year’s London Marathon, finishing in 3:22:51. Congratulations! He also managed to raise more than £3000 in support of WaterAid, an international charity working to provide clean water and decent toilets to people all over the world. Many thanks […]

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